ImageMagick 字段指南草稿

ImageMagick 字段指南草稿
A Draft of the ImageMagick Field Guide

原始链接: https://joeldare.com/imagemagick-field-guide.html

本指南提供用于常见图像处理任务的简洁ImageMagick命令。**为网络调整大小**使用`magick input.png -resize 800x> -strip -quality 75 -interlace Plane output.jpg`优化JPEG图像——保持纵横比，移除元数据，设置压缩率，并启用渐进式加载。 **减小动画GIF文件大小**使用`magick input.gif -fuzz 7% -layers optimize output.gif`，利用颜色模糊和帧优化。**将图像组合成动画GIF**使用`magick input1.png input2.png -delay 100 -loop 5 -dispose previous output.gif`来控制帧时间，循环次数和处理方法。最后，**垂直堆叠图像**通过`magick input1.jpg input2.jpg -append result.jpg`实现。本指南还指出ImageMagick可以直接处理来自**URL**的图像（需要适当的构建支持）。它强调使用`magick`命令，清晰的格式和一致的风格。

## ImageMagick 简明指南草稿发布一位开发者创建了一份关于 ImageMagick 的简明“实地指南”，ImageMagick 是一款强大的图像处理工具。该指南侧重于用于常见任务（如调整大小、GIF 优化和图像堆叠）的实用命令，并对每个标志提供简要说明。目前是初稿，作者计划扩展内容，加入关于其他常用工具（如 Git 和 Docker）的指南，最终目标是为开发者提供一系列快速参考资源。他们还打算以书籍形式出版这些指南。该草稿提供 HTML、PDF 和 ePub 格式，网址为 [https://joeldare.com/imagemagick-field-guide.html](https://joeldare.com/imagemagick-field-guide.html)，作者欢迎反馈。您还可以注册以获取未来发布的更新。

原文

Minimark

Resize an Image for the Web
Reduce Animated GIF File Size
Combine Multiple Images into an Animated GIF
Stack Images Vertically
ImageMagick with a URL
Conventions Used in This Guide

Resize an Image for the Web

magick input.png \
    -resize 800x> \
    -strip \
    -quality 75 \
    -interlace Plane \
    output.jpg

-resize 800x>

Set the width to 800px and maintain aspect ratio without upscaling smaller images. Use 800x to also upscale smaller images.

-strip

Remove EXIF, IPTC, XMP, and embedded color profiles to reduce file size.

-quality 75

Set JPEG compression to 75.

-interlace Plane

Interlace the image so that it progressively sharpens as more data arrives.

Reduce Animated GIF File Size

magick input.gif \
    -fuzz 7% \
    -layers optimize \
    output.gif

fuzz 7%

Allow a 7% color difference when comparing pixels for optimization. This helps further reduce size by treating near-identical colors as the same.

-layers optimize

Optimize the GIF animation by reducing redundant pixels between frames, which can reduce file size.

Combine Multiple Images into an Animated GIF

magick input1.png input2.png input3.png \
    -delay 100 \
    -loop 5 \
    -dispose previous \
    output.gif

-delay 100

Pause for 1 second between frames.

-loop 5

Loop the frames five times. Use -loop 0 to loop forever.

-dispose previous

Clears the previous frame before drawing the next.

Stack Images Vertically

magick input1.jpg input2.jpg input3.jpg \
    -append \
    result.jpg

-append

Stack images vertically. Use +append to stack horizontally instead.

ImageMagick With a URL

magick https://example.com/input.png \
    result.jpg

Requires ImageMagick compiled with HTTPS delegate support. Some ImageMagick builds disable remote reading.

Conventions Used in This Guide

Use input.png and output.jpg as the filenames (extensions can change as needed).
Put one switch on each line.
Use future tense such as "optimize" instead of "optimizes" or "optimized".
Use AP style heading capitalization.
Use the newer magick command instead of the older convert command.
Arbitrarily organize into what I think are the most likely use cases.

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